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// SPDX-License-Identifier: GPL-2.0
//
// HDA DSP ALSA Control Driver
//
// Copyright 2022 Cirrus Logic, Inc.
//
// Author: Stefan Binding <sbinding@opensource.cirrus.com>
#include <linux/module.h>
#include <sound/soc.h>
#include <linux/cleanup.h>
#include <linux/firmware/cirrus/cs_dsp.h>
#include <linux/firmware/cirrus/wmfw.h>
#include "hda_cs_dsp_ctl.h"
#define ADSP_MAX_STD_CTRL_SIZE 512
struct hda_cs_dsp_coeff_ctl {
struct cs_dsp_coeff_ctl *cs_ctl;
struct snd_card *card;
struct snd_kcontrol *kctl;
};
static const char * const hda_cs_dsp_fw_text[HDA_CS_DSP_NUM_FW] = {
[HDA_CS_DSP_FW_SPK_PROT] = "Prot",
[HDA_CS_DSP_FW_SPK_CALI] = "Cali",
[HDA_CS_DSP_FW_SPK_DIAG] = "Diag",
[HDA_CS_DSP_FW_MISC] = "Misc",
};
const char * const hda_cs_dsp_fw_ids[HDA_CS_DSP_NUM_FW] = {
[HDA_CS_DSP_FW_SPK_PROT] = "spk-prot",
[HDA_CS_DSP_FW_SPK_CALI] = "spk-cali",
[HDA_CS_DSP_FW_SPK_DIAG] = "spk-diag",
[HDA_CS_DSP_FW_MISC] = "misc",
};
EXPORT_SYMBOL_NS_GPL(hda_cs_dsp_fw_ids, SND_HDA_CS_DSP_CONTROLS);
static int hda_cs_dsp_coeff_info(struct snd_kcontrol *kctl, struct snd_ctl_elem_info *uinfo)
{
struct hda_cs_dsp_coeff_ctl *ctl = (struct hda_cs_dsp_coeff_ctl *)snd_kcontrol_chip(kctl);
struct cs_dsp_coeff_ctl *cs_ctl = ctl->cs_ctl;
uinfo->type = SNDRV_CTL_ELEM_TYPE_BYTES;
uinfo->count = cs_ctl->len;
return 0;
}
static int hda_cs_dsp_coeff_put(struct snd_kcontrol *kctl, struct snd_ctl_elem_value *ucontrol)
{
struct hda_cs_dsp_coeff_ctl *ctl = (struct hda_cs_dsp_coeff_ctl *)snd_kcontrol_chip(kctl);
struct cs_dsp_coeff_ctl *cs_ctl = ctl->cs_ctl;
char *p = ucontrol->value.bytes.data;
int ret = 0;
mutex_lock(&cs_ctl->dsp->pwr_lock);
ret = cs_dsp_coeff_write_ctrl(cs_ctl, 0, p, cs_ctl->len);
mutex_unlock(&cs_ctl->dsp->pwr_lock);
return ret;
}
static int hda_cs_dsp_coeff_get(struct snd_kcontrol *kctl, struct snd_ctl_elem_value *ucontrol)
{
struct hda_cs_dsp_coeff_ctl *ctl = (struct hda_cs_dsp_coeff_ctl *)snd_kcontrol_chip(kctl);
struct cs_dsp_coeff_ctl *cs_ctl = ctl->cs_ctl;
char *p = ucontrol->value.bytes.data;
int ret;
mutex_lock(&cs_ctl->dsp->pwr_lock);
ret = cs_dsp_coeff_read_ctrl(cs_ctl, 0, p, cs_ctl->len);
mutex_unlock(&cs_ctl->dsp->pwr_lock);
return ret;
}
static unsigned int wmfw_convert_flags(unsigned int in)
{
unsigned int out, rd, wr, vol;
rd = SNDRV_CTL_ELEM_ACCESS_READ;
wr = SNDRV_CTL_ELEM_ACCESS_WRITE;
vol = SNDRV_CTL_ELEM_ACCESS_VOLATILE;
out = 0;
if (in) {
out |= rd;
if (in & WMFW_CTL_FLAG_WRITEABLE)
out |= wr;
if (in & WMFW_CTL_FLAG_VOLATILE)
out |= vol;
} else {
out |= rd | wr | vol;
}
return out;
}
static void hda_cs_dsp_free_kcontrol(struct snd_kcontrol *kctl)
{
struct hda_cs_dsp_coeff_ctl *ctl = (struct hda_cs_dsp_coeff_ctl *)snd_kcontrol_chip(kctl);
struct cs_dsp_coeff_ctl *cs_ctl = ctl->cs_ctl;
/* NULL priv to prevent a double-free in hda_cs_dsp_control_remove() */
cs_ctl->priv = NULL;
kfree(ctl);
}
static void hda_cs_dsp_add_kcontrol(struct cs_dsp_coeff_ctl *cs_ctl,
const struct hda_cs_dsp_ctl_info *info,
const char *name)
{
struct snd_kcontrol_new kcontrol = {0};
struct snd_kcontrol *kctl;
struct hda_cs_dsp_coeff_ctl *ctl __free(kfree) = NULL;
int ret = 0;
if (cs_ctl->len > ADSP_MAX_STD_CTRL_SIZE) {
dev_err(cs_ctl->dsp->dev, "KControl %s: length %zu exceeds maximum %d\n", name,
cs_ctl->len, ADSP_MAX_STD_CTRL_SIZE);
return;
}
ctl = kzalloc(sizeof(*ctl), GFP_KERNEL);
if (!ctl)
return;
ctl->cs_ctl = cs_ctl;
ctl->card = info->card;
kcontrol.name = name;
kcontrol.info = hda_cs_dsp_coeff_info;
kcontrol.iface = SNDRV_CTL_ELEM_IFACE_MIXER;
kcontrol.access = wmfw_convert_flags(cs_ctl->flags);
kcontrol.get = hda_cs_dsp_coeff_get;
kcontrol.put = hda_cs_dsp_coeff_put;
kctl = snd_ctl_new1(&kcontrol, (void *)ctl);
if (!kctl)
return;
kctl->private_free = hda_cs_dsp_free_kcontrol;
ctl->kctl = kctl;
/* snd_ctl_add() calls our private_free on error, which will kfree(ctl) */
cs_ctl->priv = no_free_ptr(ctl);
ret = snd_ctl_add(info->card, kctl);
if (ret) {
dev_err(cs_ctl->dsp->dev, "Failed to add KControl %s = %d\n", kcontrol.name, ret);
return;
}
dev_dbg(cs_ctl->dsp->dev, "Added KControl: %s\n", kcontrol.name);
}
static void hda_cs_dsp_control_add(struct cs_dsp_coeff_ctl *cs_ctl,
const struct hda_cs_dsp_ctl_info *info)
{
struct cs_dsp *cs_dsp = cs_ctl->dsp;
char name[SNDRV_CTL_ELEM_ID_NAME_MAXLEN];
const char *region_name;
int ret;
region_name = cs_dsp_mem_region_name(cs_ctl->alg_region.type);
if (!region_name) {
dev_warn(cs_dsp->dev, "Unknown region type: %d\n", cs_ctl->alg_region.type);
return;
}
ret = scnprintf(name, SNDRV_CTL_ELEM_ID_NAME_MAXLEN, "%s %s %.12s %x", info->device_name,
cs_dsp->name, hda_cs_dsp_fw_text[info->fw_type], cs_ctl->alg_region.alg);
if (cs_ctl->subname) {
int avail = SNDRV_CTL_ELEM_ID_NAME_MAXLEN - ret - 2;
int skip = 0;
/* Truncate the subname from the start if it is too long */
if (cs_ctl->subname_len > avail)
skip = cs_ctl->subname_len - avail;
snprintf(name + ret, SNDRV_CTL_ELEM_ID_NAME_MAXLEN - ret,
" %.*s", cs_ctl->subname_len - skip, cs_ctl->subname + skip);
}
hda_cs_dsp_add_kcontrol(cs_ctl, info, name);
}
void hda_cs_dsp_add_controls(struct cs_dsp *dsp, const struct hda_cs_dsp_ctl_info *info)
{
struct cs_dsp_coeff_ctl *cs_ctl;
/*
* pwr_lock would cause mutex inversion with ALSA control lock compared
* to the get/put functions.
* It is safe to walk the list without holding a mutex because entries
* are persistent and only cs_dsp_power_up() or cs_dsp_remove() can
* change the list.
*/
lockdep_assert_not_held(&dsp->pwr_lock);
list_for_each_entry(cs_ctl, &dsp->ctl_list, list) {
if (cs_ctl->flags & WMFW_CTL_FLAG_SYS)
continue;
if (cs_ctl->priv)
continue;
hda_cs_dsp_control_add(cs_ctl, info);
}
}
EXPORT_SYMBOL_NS_GPL(hda_cs_dsp_add_controls, SND_HDA_CS_DSP_CONTROLS);
void hda_cs_dsp_control_remove(struct cs_dsp_coeff_ctl *cs_ctl)
{
struct hda_cs_dsp_coeff_ctl *ctl = cs_ctl->priv;
/* ctl and kctl may already have been removed by ALSA private_free */
if (ctl && ctl->kctl)
snd_ctl_remove(ctl->card, ctl->kctl);
}
EXPORT_SYMBOL_NS_GPL(hda_cs_dsp_control_remove, SND_HDA_CS_DSP_CONTROLS);
int hda_cs_dsp_write_ctl(struct cs_dsp *dsp, const char *name, int type,
unsigned int alg, const void *buf, size_t len)
{
struct cs_dsp_coeff_ctl *cs_ctl;
struct hda_cs_dsp_coeff_ctl *ctl;
int ret;
mutex_lock(&dsp->pwr_lock);
cs_ctl = cs_dsp_get_ctl(dsp, name, type, alg);
ret = cs_dsp_coeff_write_ctrl(cs_ctl, 0, buf, len);
mutex_unlock(&dsp->pwr_lock);
if (ret < 0)
return ret;
if (ret == 0 || (cs_ctl->flags & WMFW_CTL_FLAG_SYS))
return 0;
ctl = cs_ctl->priv;
snd_ctl_notify(ctl->card, SNDRV_CTL_EVENT_MASK_VALUE, &ctl->kctl->id);
return 0;
}
EXPORT_SYMBOL_NS_GPL(hda_cs_dsp_write_ctl, SND_HDA_CS_DSP_CONTROLS);
int hda_cs_dsp_read_ctl(struct cs_dsp *dsp, const char *name, int type,
unsigned int alg, void *buf, size_t len)
{
int ret;
mutex_lock(&dsp->pwr_lock);
ret = cs_dsp_coeff_read_ctrl(cs_dsp_get_ctl(dsp, name, type, alg), 0, buf, len);
mutex_unlock(&dsp->pwr_lock);
return ret;
}
EXPORT_SYMBOL_NS_GPL(hda_cs_dsp_read_ctl, SND_HDA_CS_DSP_CONTROLS);
MODULE_DESCRIPTION("CS_DSP ALSA Control HDA Library");
MODULE_AUTHOR("Stefan Binding, <sbinding@opensource.cirrus.com>");
MODULE_LICENSE("GPL");
MODULE_IMPORT_NS(FW_CS_DSP);
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